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Re: Optimistic Locking Example
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Re: Optimistic Locking Example


  • Subject: Re: Optimistic Locking Example
  • From: "Ruenagel, Frank" <email@hidden>
  • Date: Mon, 23 May 2005 17:08:06 +0200

Hi,

The described behaviour may seem like a bug, but it is
quite normal.

Helpful may be the following:

http://conferences.oreillynet.com/cs/macosx2002/view/e_sess/3189

You'll have to implement custom logic to warn your users
if they overwrite fresher data within the same EOObjectStore.

HTH
Frank

> -----Original Message-----
> From: Dmitri [mailto:email@hidden]
> Sent: Monday, May 23, 2005 1:45 PM
> To: WebObjects-List Apple
> Subject: Optimistic Locking Example
>
>
> Hi every1,
>
> i wanted to ask if some could send me small example programm for
> optimistic locking. I mean i tryed to write one now. Just made simple
> WOApplciation "Test".
> Than added to this e Emodel like "test".
>
> Now i had Applicatin Test.woa qwith nice model in it "test.eomodeld"
> with only one Table "Test", with 3 attributes. testid (PrimaryKey
> Locked), testfield1(Integer, Locked), testfield2(String Locked).
>
> Now if i try to get on this applicatipn from 2 differend Browsers and
> editing same object there. Like User1 takes this object to edit, Than
> user2 takers this object to edit. User2 saves Changes. User1 saves
> changes. here must be actually exeption from Optimist locking, that
> object was already saved and have changed his values, but nothing
> happens. values just overwrite last saved data in databse. Do i
> understand it right, that my Optimistic Lockign thing is not working ?
>
> So if some1 could write small application with using and actually
> getting exception on saving from two different instances, i
> would very
> appreciate this.
>
> Dmitri
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